4.1 Mandatory requirements of national standards (GB/T 31246-2014)

• Appearance: White or slightly yellow granules/powder, with no obvious mechanical impurities;
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• Solid content: ≥90%, ensuring sufficient active ingredients in the product and avoiding the inclusion of ineffective fillers.
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• Dissolution time: 0.1% aqueous solution ≤ 60min, ensuring the efficiency of on-site dosing operations.
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• Intrinsic viscosity: 4.0-15.0dL/g, indicating that the molecular weight and degree of polymerization of the product meet the standards.
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• Free acrylamide monomer: ≤0.05%, meeting environmental protection and health safety requirements.
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• Water-insoluble substances: ≤0.2%, reducing the risk of equipment blockage and pipeline residue, and improving the utilization rate of chemicals.
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• 4.2 Enterprise Internal Control Quality Standards (Higher than National Standards, Ensuring High-end Applications)

  • Degree of ionicity deviation: within ±2%, to avoid the loss of control of dosage and unstable treatment effect caused by fluctuations in the degree of ionicity.
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  • Viscosity of aqueous solution: The viscosity of 0.2% concentration aqueous solution is ≥300 mPa·s, ensuring that the flocculation and thickening properties meet the standards.
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  • Sludge dewatering rate: For municipal biochemical sludge, the moisture content of floc cake is ≤70%, and the dewatering effect meets the standard.
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  • Storage stability: When stored at room temperature and in a dry environment for 12 months, the solid content and ionic degree decay by ≤1%, and there is no significant decrease in performance;
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  • Impurity content: Heavy metal ions (lead, cadmium, mercury, etc.) ≤ 1mg/kg, meeting the requirements for hazardous waste management and resource utilization.

  • 4.3 Quality Inspection Rules

    1. Factory inspection: Each batch of products must undergo testing for five core indicators: appearance, solid content, dissolution time, free monomers, and water-insoluble substances. Only qualified products can leave the factory, accompanied by a product quality inspection report.

     

    2. Formal inspection: Conduct a full range of indicator tests every six months or when there are significant changes in raw materials or production processes, covering all requirements of national standards and enterprise internal control indicators to ensure long-term compliance of products;

     

    3. Sampling rules: Implemented in accordance with the provisions of GB/T 6678, random sampling is adopted, with a sampling quantity of not less than 500g. The sample is divided into two parts: one part for testing, and the other part for retention and future reference, with a retention period of 6 months.

    V. Core Uses and Application Scenarios of the Product

    5.1 Core Usage Positioning

    High-ionicity solid cationic polyacrylamide mainly focuses on solid-liquid separation in high-organic-matter anionic systems, with core applications in deep sludge dewatering and high-concentration organic wastewater treatment, while also catering to special scenarios such as papermaking, mineral processing, and oil fields. It is a specialized and high-efficiency agent for solving difficult water treatment and sludge disposal problems. Unlike medium and low-ionicity products, it is more suitable for complex and harsh water quality conditions and high-requirement disposal standards.

    5.2 Detailed Explanation of Subdivided Application Scenarios

    5.2.1 Deep Sludge Dewatering (Core Key Scenario)

    • Municipal sludge dewatering: Suitable for biochemical excess sludge from urban sewage treatment plants. The high-ionicity charge quickly neutralizes the negative charge of the sludge, forming dense flocs. When used in conjunction with belt, plate-and-frame, and centrifugal dewatering machines, the moisture content of the sludge is reduced from over 95% to 60%-70%, significantly reducing the sludge volume and lowering the costs of landfill, incineration, and composting disposal.
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    • Industrial sludge dewatering: For high-organic-matter sludge from printing and dyeing, papermaking, slaughtering, food processing, chemical industry, etc., it breaks the colloidal stability of sludge, solves the problems of poor dehydration effect of conventional flocculants, high moisture content of filter cakes, and filter cloth sticking, and is suitable for various industrial sludge disposal lines;
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    • Special sludge treatment: For sludges containing complex organic substances such as electroplating sludge, pharmaceutical sludge, and landfill leachate sludge, it can achieve efficient flocculation and dehydration, meeting the requirements for reduction and harmless disposal of hazardous waste sludge.
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    5.2.2 Treatment of High-Concentration Organic Wastewater

    • Municipal sewage treatment: Used for advanced treatment of secondary biochemical effluent from municipal sewage, removing residual colloids, organic matter, and total phosphorus, improving the quality of effluent water, and helping to meet discharge standards.
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    • Industrial organic wastewater: For dyeing wastewater (decolorization and turbidity removal), papermaking wastewater (COD reduction), slaughterhouse wastewater (protein removal), and food processing wastewater (suspended solids removal), the flocculation effect is better than that of conventional agents. The effluent is clear and can be reused or discharged up to standard.
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    • Landfill leachate treatment: In the pretreatment stage, flocculation is used to remove macromolecular organic substances and colloidal impurities, reduce the load of subsequent biochemical treatment, and improve the efficiency of leachate treatment.
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    • 5.2.3 Special for Paper Industry

      • Retention and drainage aids: Adsorb pulp fibers and fillers, improve the retention rate of fine fibers, reduce raw material loss, accelerate the water filtering speed of the wire section, and enhance the efficiency of the papermaking production line.
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      • Paper dry strength agent: Enhances the bonding force between paper fibers, improves the dry strength and folding endurance of paper, enhances paper quality, and reduces the breakage rate of paper products.
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      • 5.2.4 Other Special Applications

        • Mining beneficiation industry: Treatment of beneficiation wastewater from non-ferrous metals and non-metallic minerals, flocculation of mineral sludge particles, clarification of water quality, and realization of wastewater reuse;
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        • Oilfield exploitation: Oilfield profile control and water plugging, drilling mud treatment. Utilizing flocculation and thickening properties to block high-permeability channels in the formation and improve crude oil recovery.
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        • Textile printing and dyeing: Dye fixation, decolorization of printing and dyeing wastewater, improvement of dye uptake rate, reduction of dye loss, and lowering of wastewater chromaticity.
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        • VI. Product Usage Methods and Operation Specifications

          6.1 Dissolution Operation Specifications (Core Steps)

          High-ionicity CPAM is strictly prohibited from being directly added as dry powder. It needs to be prepared into an aqueous solution in advance for use. The specific process is as follows:

           

          1. Water for dissolution: Tap water or softened water should be used; water with high salinity, strong acidity, or strong alkalinity should be avoided. The water temperature should be controlled between 20-40°C. If the water temperature is too low, dissolution will be slow; if it is too high (>60°C), it will damage the molecular chains and reduce the product performance.
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          3. Preparation concentration: The standard concentration is 0.1%-0.3%, and it can be increased to 0.3%-0.5% for high-difficulty treatment scenarios. If the concentration is too high, it is easy to agglomerate; if it is too low, the dosage will be too large, increasing energy consumption.
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          5. Stirring operation: Add a fixed amount of clean water to the dissolution tank, turn on the stirrer, adjust the rotation speed to 100-200r/min (excessively high rotation speed will shear the molecular chains, while excessively low rotation speed may easily cause agglomeration), slowly and evenly sprinkle the product dry powder, stir while sprinkling, and avoid large amounts of feeding at one time;
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          7. Dissolution time: Stir continuously for 30-60 minutes until the solution becomes transparent and viscous, with no visible particles or agglomerates to the naked eye. After complete dissolution, let it stand for 5-10 minutes before adding.
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          9. Solution Storage: The dissolved aqueous solution must be used up within 24 hours. Avoid prolonged standing, as it may degrade and become ineffective. It is strictly prohibited to store it together with strong oxidants and ferric salt substances.

          10. 6.2 Dosing Operation Specifications

              • Dosing method: Use a metering pump for continuous and uniform dosing. Avoid intermittent large-dose dosing to ensure sufficient mixing of the agent with wastewater/sludge.
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              • Reference dosage: Sludge dewatering: 5-15g/ton of absolutely dry sludge; Wastewater treatment: 3-10mg/L (3-10g/ton of wastewater); The specific dosage needs to be determined through on-site small-scale tests to avoid floc re-dispersion caused by excessive dosage.
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              • Compound use: When compounded with inorganic flocculants (PAC, PFS), first add the inorganic agent, stir and react for 5-10 minutes, then add the CPAM aqueous solution to synergistically improve the flocculation effect and reduce the dosage of agents.
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              • Small-scale test process: Take 1L of water sample/sludge to be treated, add different doses of CPAM solution in sequence, stir and observe the floc formation speed, sedimentation effect, and transparency of the supernatant to determine the optimal dosage.

              • 6.3 Safety Operation Precautions

                • Wear gloves and masks during operation to avoid direct contact of dry powder with skin and eyes. If contact occurs accidentally, rinse immediately with plenty of water.
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                • The dissolving equipment must be well-sealed to reduce dry powder dust, and the workplace should be kept ventilated and dry.
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                • It is strictly prohibited to store or dissolve this product together with anionic polyacrylamide or strong oxidants to prevent the product from becoming ineffective;
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                • Regularly clean the dissolving tank and dosing pipes to prevent residual chemicals from caking and clogging the equipment.

                • VII. Product Packaging, Transportation, Storage and Preservation Specifications

                  7.1 Packaging Specifications (Multi-dimensional Adaptation Requirements)

                  • Regular packaging: 25kg/bag, with a high-pressure polyethylene plastic bag as the inner lining and a polypropylene woven bag as the outer layer, featuring moisture resistance, damage resistance, and strong sealing performance.
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                  • Large packaging: 500kg/bag, 1000kg/bag, suitable for large-scale industrial procurement, and convenient for forklift loading and unloading as well as warehouse stacking;
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                  • Packaging Marking: The bag clearly indicates information such as product name, model, ionicity, net content, execution standard, production date, batch number, manufacturer, shelf life, and safety warnings. The marking is clear and not easy to fall off.
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                  • 7.2 Transportation Specifications

                    • Transportation vehicles must be clean and dry. They should avoid exposure to sunlight, rain, and moisture. It is strictly prohibited to transport the product together with strong oxidants, acids, alkalis, and flammable and explosive materials.
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                    • Handle with care during loading and unloading to avoid damage to the packaging bags and spillage of the product. The loading and unloading of ton bags must be operated in a standardized manner to prevent falling.
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                    • Keep the transportation process stable, avoid severe jolts and excessive stacking pressure, and ensure the packaging remains intact.
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                    • VIII. Common Problems and Solutions

                      Frequently Asked Questions	Causes of the problem	Solution
                      Caking and fisheyes appear during dissolution	Adding materials too quickly, insufficient stirring speed, too low water temperature	Feed slowly and evenly, adjust the stirring speed to 100-200r/min, and raise the water temperature to 20-40℃
                      Loose flocs, slow sedimentation	Insufficient dosage, mismatched ionicity, incompatible water pH	Increase the dosage, replace with a product with suitable ionic degree, and adjust the water pH to 3-10
                      High moisture content after sludge dewatering	Low ionic degree, improper dosage, mismatched parameters of dehydration equipment	Select products with higher ionicity, optimize the dosage, and adjust the rotation speed and pressure of the dehydrator
                      The viscosity of the aqueous solution decreases rapidly	Excessively high dissolving water temperature, excessively long storage time, and mixing with impurities	Control the water temperature to be ≤ 40℃, use it up within 24 hours, and avoid mixing in impurities.

                      IX. Product Compliance and Environmental Protection Instructions

                      This product strictly complies with the national standard GB/T 31246-2014. All indicators meet the requirements of environmental protection control. The contents of residual monomers and heavy metals are far lower than the limit values. The treated water quality and sludge have no secondary pollution, and can be safely used in various municipal and industrial water treatment scenarios. The product packaging is recyclable, and there are no environmental risks during storage and transportation, which meets the industry development requirements of green environmental protection and low-carbon emission reduction.

                      
                      

                      Note: All parameters and uses in this instruction manual are based on laboratory tests and on-site practical operation verification. Due to differences in water quality and sludge characteristics in various scenarios, it is recommended to conduct small-scale tests before actual use to determine the optimal dosage plan and ensure the maximum performance of the product.